Tegg Centrifuge Tubes 200PCS 0.5 ml Clear Graduated Polypropylene Microcentrifuge Vials Tubes with Attached Lids

They do what they are suppose to do.

Very small, very narrow, difficult to fill and hard to securely close the top

These are perfect for my little jewelry beads i make and ship! They actually stay closed!

Great quality and price.

Great for seeds for my classes

They fit great in the centrifuge, no leaks, get the job done perfectly.

Good quality

I use these for very tiny geocache containers. Its important that the lid fits tight and they do.

Great will easily hold 12 popcorn kernels